Forgot about this...
Further to all the helpful pointers from the thread, thank you, and I can report back to say job's a good'un. Well...'ish'. Elmo, glad to hear your issues have been banished. Top man!
Chris W...spot on mate. As mentioned; swapped the Apexis for (Sunny's) BCs as they were on the way out. Along with new upper control arms, drop links (cheers Elmo) and rear diff, it's been a dream to finally be 'noise free'. With geo-alignment and the coils set up for daily use, I actually started to enjoy driving again! Work was completed relatively stress free (shock!). No angle grinders and/ or burnt/ broken car/ body parts. Well...kept to a minimum anyway.
BUT...unfortunately my respite was brief. I now have a squeaky front. (...steady.) Not a huge drama but after a few miles of driving it can get on the proverbial wick. Think squeaky bed springs when...well...you get the gist.
Car was back up on the ramp today. Ran through various checks and closer inspection pointed to bushes. In particular on lower arm and showing signs of play. Gave a few squirts of WD40 on all main connecting points and left to soak overnight. Will see tomorrow if that will eliminate the annoying squeaks. If not I'll be on that search function looking for pointers Poly vs. OEM.
To be continued...